Electric elevator system



March 3o, 1937. W E EAMEE ET AE 2,075,102

ELECTRIC ELEVATOR SYSTEM Filed Aug. 24, 1934 6 Sheets-Shet 1 March 30,1937. w, F, EAMES ET AL 2,075,102

ELECTRIC ELE/ATOR SYSTEM AT RNEY March 30, 1937. w. F. EAMES ET AL2,075,102

ELECTRIC ELEVATOR SYSTEM Filed Aug. 24, 1934 e sneetsheet 3 raf/hgdov-:12 E lNvENT /l//y//nam FIL-me and E f/a Ap/RNEY iff- WITNESSES:

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ELECTRIC ELEVATOR SYSTEM l AT NEY ma@ Q Much 30, 1937.

W. F. EAMES ET AL ELECTRIC ELEVATOR SYSTEM Filed Aug. 24, 1954 6Sheets-Sheet 5 AT NEY March 30, W F. EAMES ET AL ELECTRIC ELEvAToRSYSTEM WTNESSESI NVENTORS d c E F29 7 Maarn/#fmes n n 7 an d//amhgPatented Mar. 30, 1937 PATENT OFFICE ELECTRIC ELEVATOR SYSTEM William F.Eames, Edgewood, and William R.

Harding, Wilkinsburg, Pa., assignors to Westinghouse Electric ElevatorCompany, Chicago, Ill., a corporation of Illinois Application August 24,1934, Serial No. 741,270

24 Claims.

The present invention relates to systems of control for electricelevators and more particularly, to such systems in which a number ofcars operating as a bank are controlled from push buttons located at thefloor landings of the building and in the respective cars.

Earlier systems of control comprise an arrangement in which any car of abank of cars may be stopped in response to operation of either a singleup button or a single down button located in the corridor and common toall of the cars. In these systems, commonly, operation of any hallbutton registers a call which is maintained on the system and is notappropriated to any particular car until the arrival of a car within ashort distance of the corresponding floor.

In the absence of means to predetermine which car of the system ywillrespond to a call, it has 0 been found impracticable to light the halllantern at the corresponding iioor until the arrival of a car at orabout the slow-down point for the corresponding floor. For this reason,there v is frequently a considerable period after an intending passengerhas registered a call before he is given an indication as to which carof the bank will stop for him. Moreover, the lighting of the iloorlantern occurs only a relatively short time before the arrival of thecar at the correspond- ;m ing floor landing, and it has been found thatan appreciable amount of time is lost by the passenger in moving to andboarding the corresponding car.

The copending application of W. F. Eames, Serial No. 700,257, filedNovember 29, 1933, and assigned to the Westinghouse Electric ElevatorCompany, discloses a system of this general type, but in which a call,upon being registered by an intending passenger, is immediatelyappropriated ,i0 to the nearest car travelling in the correspondingdirection, regardless of the distance between such car and thecorresponding floor. The appropriation to a particular car results inthe immediate lighting of the floor lantern for that car at thecorresponding floor, thereby immediately informing the intendingpassenger which car of the bank will stop for him, and enabling him toproceed to a position in front of the corresponding hatchway door.

5() Under certain conditions of traffic and in certain classes ofbuildings, it has been found desirable to enable the operator of suchnearest car to determine Whether his car Will respond to such registeredcalls, and thereby overcome the 55 possibility of more calls beingappropriated to a particular car than that car can handle expeditiously.

The present invention comprises a system similar, in many respects, tothe system disclosed in the above-identified Eames application, but inwhich registration of a call on a passenger operated push button in thecorridors immediately operates a signal in the car which is nearest, andtravelling in the corresponding direction. Means are provided in eachcar to enable the operator thereof to appropriate such registered callto his car. The arrangement is such that although a number of calls maybe simultaneously registered by intending passengers, with respect towhich such car is the nearest car, the operator thereof may appropriatesuch calls to his car one at a time. The appropriation to a car of a.call results in immediate llighting of the floor lantern for that car atthe corresponding floor.

With this arrangement, the operators of the respective cars are enabledto determine at any time how many additional passengers their cars areable to accommodate, and to limit the number of calls appropriated totheir cars to such number.

It is an object of the present invention accordingly to provide anelevator control system in which operation of a passengers call button,common to all the cars, causes an immediate signal in one of the carstravelling in the corresponding direction.

It is a further object of the present invention to provide such a systemin which such signal is received by the car nearest to the correspondingiloor travelling in the corresponding direction, to the exclusion of theother cars.

It is a further object of the present invention to provide such a systemin which each operator is provided with means to enable him toimmediately appropriate such registered call to his car.

It is a further object of the present invention to provide such a systemin which the means in the cars for appropriating calls thereto arecommon to all the floors.

It is a further object of the present invention to provide such a systemin which such registered calls may be appropriated to the cars one at atime, although a number of such calls may exist simultaneously.

It is a further object of the present invention to provide such a systemin which the appropriation to a particular car of a registered callresults in the immediate illumination of the door lantern for that carat the corresponding floor.

Cir

It is a further object of the present invention to provide such a systemin which failure by the operator of a nearest car to respond to such aregistered call leaves such registered call for a succeeding car.

Other objects of the present invention will become evident from thefollowing detailed description taken in conjunction with theaccompanying drawings, in which Figure l is a diagrammatic view showingthe relationship of certain mechanical and electriu cal elements cf anelevator' system as used in the practice of the present invention.

Fig. 2 is a diagrammatic view of part of the ricer sel ctor shown inFig. l.

Figs. 3, 4, 5, 6 and 7 taken together illustrate diagrammatically acomplete control system for two cars, embodying the present invention.In these figures the circuits have been classified into eight groups andthe circuits included in the respective groups indicated by bracketswhich appear along the right-hand margin of each figure. Throughout thedescription, mention of a coil or contact member is in most casesfollowed by a reference to the group in which it appears, to assist inlocating it in the drawings. The locations of the respective coils andcontact members are also given in a tabulation at the beginning of thedetailed description of operation.

Except where specified the relays and switches illustrated in thedrawings are conventional, each comprising a coil disposed to actuate amovable armature. The movements ci the armatures open or close variouscontact members. In the drawings any coils and the contact membersoperated thereby bear the same reference characters, with the exceptionthat the contact members have an additional identifying letter. Forexample, the contacts operated by coil SBU-l are designated Sima-L tUb-,80Uc-l, etc.

The operation of the system as a whole, and the apparatus illustrated inthe respective gures may be described generally as follows.

Each intermediate :door landing is provided with one up push button andone down push button, common to all of the cars of the bank, foroperation by intending passengers to register calls for service.

The up and down push buttons for four intermediate floors, the third,fourth, fifth and sixth, are shown in Fig. 3 (Group I) and are identiedby the legends CSU, CllU, C5U, CEU and 03D, CQD, CED and CSD,respectively. A single push button is provided at each terminal landing.Since the terminal push button circuits are in all respects similar tothe intermediate ioor push button circuits, they have been omitted fromthe drawings.

Calls registered by operation of the respective push buttons aremaintained temporarily on a set of call-registering relays, common toall of the cars. 'Ihese relays are shown in Fig. 3, Group I. The uprelays for the third, fourth, fth and sixth floors are designated ASU,A4U, A5U and AGU, respectively, and the down relays as ASD,

Alli), AD and AGD, respectively. Each call registering relay comprisesan actuating coil, energized in response to the corresponding pushbutton, and a magnetically opposed resetting coil, energized when thecorresponding call is appropriated to one of the cars, as laterdescribed.

Operation of any call-registering relay results in immediate operationof a call indicating or operators signal in the nearest approaching car.By the term nearest approaching car we mean that car whose position,direction of operation and distance from the iloor of the operated callregistering relay will permit it to be stopped when it arrives at thatfloor. In other words it means the nearest car for the desired directionwhich is still capable of being stopped at the floor at which a stopcall is registered at the time the call is registered. The operatorssignal for cars l and 2, shown in Fig. l and in Fig. 7, Group VII areidentified as FI and F-2, respectively.

The selection of the nearest car is accomplished by means of a group ofzoning relays shown in Fig. 5, Group III. Each oor is provided with oneup zoning relay and one down zoning relay, all of which are common toall of the cars. The up zoning relays for the third, fourth, fifth andsixth floors are identiiied as S3U, S4U, S5U and SEU, respectively, andthe corresponding down zoning relays are identified as SSD, SD, SED andStD, respectively.

Each car of the bank is provided with an operators push button, toenable the operators to respond to calls indicated by the respectiveoperators signals. These are shown in Fig. 7.

Group VIII, the operators push button for car l being identified as AB-Iand that for car 2 as A13-2. The operators push buttons may be of anyhand operated type, but are preferably semi-portable and connected tothe control panels in the respective cars by means of exible cords, asshown in Fig. l.

Operation of the operators push button transfers the registered callfrom a call-registering relay to a corresponding call-storing relay.Each oor is provided with an up and a down callstoring relay individualt'o the respective cars. The call-storing relays are shown in Fig. 4,Group II, the up call-storing relays for car l for the third, fourth,fth and sixth floors being designated BSU-I, B4U-I, BSU-l and BSU-l.Those for the down direction are designated B3D-I, B4D--l, B5D--l andB6DI. The corresponding call-storing relays for car 2 are similarlydesignated but have a suffix 2 instead of l. The call-storing relays aresimilar in structure to the call-registering relays, each comprising anactuating coil energized through a circuit controlled by the Zoningrelays, the corresponding call-registering relays and the operators pushbutton, and a resetting coil energized when the associated car stops atthe corresponding floor.

As soon as a call has been transferred from a call-registering relay toa call-storing relay, the call-registering relay is reset, andmaintained so until the car associated with the call-storing relay stopsat, and leaves, the corresponding oor. The call-registering relaycancelling circuits are shown in Fig. 6, Group V, and include an upcancelling relay and a down cancelling relay for each iloor common toall the cars. The up relays for the third, fourth, fifth and sixthfloors are designated M3U, M4U, M5U and MSU, respectively. The downrelays are designated MSD, MQD, M5D and MSD. As is later described,operation of any cancelling relay completes the circuit for theresetting coil of the corresponding callregistering relay.

The arrangement of the actuating circuits for the call-storing relays issuch that although a number of calls may be registered simultaneously inthe Zone for a particular car, a single operation of the operatorspush-button for that car results in the appropriation to that car ofonly one call. The call so appropriated is for the oor nearest the car'.Through this arrangement, the operator of the car may determine how manycalls his car is to receive. If he discovers that his car has becomefully loaded, he may fail to operate his operators push-button inresponse to his operators signal. Calls stored on the call-registeringrelays, to which the operator of such nearest car fails to respond, aremaintained for the next following car. Any calls prleviouslyappropriated to such nearest car remain effective to stop it at thecorresponding floors.

Prolonged closure of an operators push-button results in lighting awarning signal in the corresponding car, and also results in isolatingthat car from the zoning system. The warning lights for cars I and 2 areshown in Fig. l and in Fig. '7, Group VIII, and are designated as W-land W-2, respectively. Additional warning signals 24-I and 24-2 for carsI and 2, respectively, are shown in Fig. 3, Group I, for

operation in the event an operator fails to respond to the operatorssignals F-I and F-2, respectively. 'I'he latter signals are preferablylocated at the dispatchers station and will serve to warn the dispatcherthat the corresponding car is being isolated from the Zoning system.

As soon as a call is appropriated to one oi the cars, by operation ofthe corresponding operators button, a floor lantern corresponding tothat car and located at the iloor corresponding to the registered callis immediately lighted. Each car is provided with an up and a down iioorlantern for each floor. The up oor lanterns associated with car I, forthe third, fourth, fifth and sixth iloors are shown in Fig. 6, Group VI,the up floor lanterns being designated respectively as L3U-I, L4U-I,LSU-I, and LSU-I and the down floor lanterns as L3D-I, L4D--I, LSD-I,and LiD-L The up and down floor lanterns for car 2 are similarlydesignated but have a suffix The oor lanterns, upon being lighted in themanner above indicated, remain lighted until the car stops at and leavesthe corresponding ilocr.

Each car of the bank is provided with a set of buttons including onebutton for each floor,

located within the respective cars for the purpose of registering stopcalls for iioors at which passengers desire to leave the car. Thesestopping buttons are preferably collected in a panel, together with theoperators signal, warning light and operators push-button, as shown inFig. i.

The circuits for the car buttons for cars I and 2 are shown in Fig. 5,Group IV, the buttons for the third, fourth, fifth and sixth floors forcar I being designated as PR3-I, PE4-I, PRE-I and PRB-I, respectively.The car buttons for car 2 are similarly designated but have a sunix 2.The car buttons are manually closable but are provided with retainingcoils, adapted to maintain the associated button in the closed positionafter having been closed manually. The retaining coils, which appearimmediately below the corresponding buttons, are normally energized andare arranged to be momentarily deenergized each time the associated caris reversed.

Each car is provided with a stopping relay arranged to respond to eitherthe car buttons or the call-storing relays for the corresponding car asthe car approaches a floor at which a call has been registered. Thestopping relays are shown in Fig. 5, Group IV, and are designated 38-Iand 38-2, for cars I and 2, respectively. Operation of the stoppingrelay for either car prepares circuits which cause the associated car toslow down and stop.

As shown in Fig'. l, the elevator car is attached l to a cable c whichpasses over a sheave 3 to a counterweight 4 to provide a direct tractiondrive. Sheave 3 is mounted on the shaft of a hoisting motor 5, togetherwith the drum of a springappiied electro-magnetically-released brake 6.The circuits directly concerned with the control of the motor 5 form nopart of the present invention, but have been illustrated as of thevariable voltage or Ward-Leonard type, and are shown in Fig. 7, GroupVIII.

Referring to Group VIII, the armature 5 is directly connected to thearmature of a generator G. Generator G is provided with a separatelyexcited held winding Gf, which may be selectively excited to determinethe direction and speed of elevator motor 5, in a well known manner.Suitable speed regulating apparatus for the system is illustrated ascomprising a series field GS on generator G. The starting andacceleration of motor 5 is controlled by an up button BU-I and a downbutton BD i, preferably mounted in the car station panel in the mannerindicated in Fig. 1. The details of the motor control system aredescribed later.

The slow-down and stopping of motor 5 is preferably controlled by meansof switches of the type shown in Patent No. 1,902,602, granted March 2l,1933 to Williams et al. and assigned to the Westinghouse Electric &Manufacturing Company. As there illustrated, such switches comprise anenergizable winding, an iron core and a plurality of contact iingers.The contact fingers are so disposed in the magnetic circuit of the coilthat energization of the coil is ineffective to cause movement of thecontact fingers.

The magnetic circuit is so arranged, however, that movement of amagnetizable plate into the region of the switch actuates a Contactringer. Preferably, each of the contact fingers has associated therewitha magnetizable plate which, when moved into the region of the switch,actuates the corresponding contact nger and does not actuate the otherfingers.

The magnetic circuit of the switch is further arranged in such a waythat while the presence of a magnetizable plate is required to initiallyactuate a contact finger, such linger when actuated, remains in theactuated position as long as the coil of the switch is energized, eventhough the switch is moved away from the region of the plate.

In the illustrated embodiment of the present invention, two switches ofthis type are employed per car. Those for car I are designated IR--I andZR--L Switch IR-I is used for stopping and is provid-ed with one upinductor plate IU per floor, and one down inductor plate ID per ricer,as shown in Fig. l. Plates lU and ID are so mounted with respect to theassociated oor that switch IR-I is breught opposite them just before thecar reaches the associated floor, when travelling in the up and downdirection, respectively.

Switch .ER- E is used as a slow-down device and is provided with one upplate 2U per iioor and one down plate 2D per door. Plates 2U and 2D areso located with respect to the doors that switch QR-i is broughtopposite them when the car reaches the slow down position for thecorrespondking hoor when travelling in the up and down direction,respectively.

The circuits shown in Figs. 3, 4, 5, 6 and 7, Groups I, II, IiI, IV, VIand VII are commutated in accordance with the position of the respectivecars with respect to the iloor landings by means of floor selectorsindividual to the cars. The driving mechanism and arrangement of theiloor selector for one car is shown generally in Fig. l, and in somewhatmore detail in Fig. 2. Referring particularly to Fig. the drivingmechanism comprises a telemotor transmitter l', preferably of theself-synchronizing type, which is directly connected to the shaft ofelevator motor 5.

Telemotor transmitter 'i is electrically connected with a telemotorreceiver 8 of the same type, in a well known manner, so that anyrotation of the armature of transmitter 'l produces a proportionalrotation, in a corresponding direction, of

n the armature of 11eceiver 8.

Telemotor receiver 8 serves as a driving device for floor selector l,which comprises a vertically mounted base panel lil, upon which aresecured suitable guide rails il for a pair of vertically movablecross-head members l2 and i3. The cross-head members l2 and I3 aremechanically connected together by means of a chain I4 which passes overan idler sprocket l5. rotatably mounted on the base panel lll, and adriving sprocket i8, rotatably supported by means of a casing ll mountedupon the base panel l5. The casing il' contains suitable gearing (notshown) for transmitting the motion of the armature of the telemotorreceiver 8 to the driving sprocket i6.

The construction so far described is such that movements of the elevatorcar l are reproduced on a smaller proportionate scale as movements ofthe cross-head members i2 and lf3. Although either cross-head member i2or i3 may move upward in response to upward movement oi the car l,depending upon the phase sequence of the electrical connections betweentelemotor transmitter 'i and telemotor receiver 8, it is assumed thatthe telemotor connections are such that cross-head member' i3 movesupward when the car moves upward and covers its entire path of travelfrom bottom to top while the elevator car I is moving from its lowerterminal limit to its upper terminal limit.

The cross-head members l2 and i3 each support a number of conductingbrushes, disposed to engage and disengage groups of conducting segmentsmounted on the panel IS.

The rows of segments and brushes are shown in relation to theirassociated circuits in Figs. 3, 4l, 5, 6 and 7. The positions oi theseveral brushes with respect to the segments for various positions ofthe car are shown in Fig. 2.

Referring to Fig. 2, fteen rows of segments are illustrated. Each rowincludes one segment per floor, and each segment is designated by areference character which identies the iioor and row with which it isassociated. The segments in rows b, d, f, h, y', 1t and r, in the lefthand portion of Fig. 2, under the legend down segments, cooperate withthe brushes on cross-head l2, to commutate various circuits duringdownward travel of the car. The segments in rows a, c, e, g, i, lc, mand p, in the right hand portion of Fig. 2, beneath the legend upsegments, cooperate with brushes on cross-head l 3 to commutate variouscircuits during upward travel of the car. Segments 32ai, fik-L tlcl andSic-E cooperate with two brushes on cross-head i3, one brush beingefiective during down tra-vel and one brush being effective during uptravel of the car.

The brushes which cooperate with the segments in rows a, o, e, g, i, lc,m and p, respectively, are designated a-l, c--l, e-l, g-l, i-l,

auf/5,102

1CD-l, ICU-l, m-I and p-l. In Fig. 2, these brushes are shown in theposition they occupy with respect to the segments when the car isstanding at the fth floor. The positions occupied by these brushes whenthe car reaches the slow down position for the fth iloor travellingupwardly is shown by circular elements which appear a short distancebelow the respective brushes. Similarly, brushes Zi-l, d-l, f-L h-I,j-l, n-l and T-l which cooperate with the segments in rows l), d, f, it,9', 1t, and 1, respectively are shown in their relative positions to thedown segments when the car is standing at the fth floor. The position ofthese brushes when the car is at the slow down position in advance ofthe fth iioor, travelling downwardly, is indicated by circular elementsunder the respective brushes. These relative positions are alsoindicated in a legend at the bottom of Fig. 2.

The brushes which cooperate with rows a4 and b control the dispatchersignal @lv- 5, previously mentioned. These brushes engage a segment justafter the car passes the slow down point for the corresponding floor andpass out of engagement with the segment just before the car reaches thecorresponding oor. (Group I.)

'Ihe brushes which cooperate with the segments in rows c and d controlthe resetting of the call registering relays. These brushes engage asegment just before the car reaches the slow down point for thecorresponding door and remain in engagement with the segment until thecar passes a short distance beyond that loor. (Group I.)

The brushes which cooperate with the segments in rows e and f controlthe resetting of the call-storing relays. These brushes engage a segmentjust before the car reaches the slow down point for the correspondingfloor, and remain in engagement until the car passes a short dista-ncebeyond that oor. (Group II.)

The brushes which cooperate with the segments in rows g and h controlthe actuation of the call-storing relays. These brushes pass out ofengagement with a segment just before the car passes the slow down pointfor the corresponding floor, and are in engagement with the segment forthe next iioor when the car is standing at any floor. (Group II.)

The brushes which cooperate with the segments in rows z' and j controlthe zoning relays, there being two brushes per row spaced a shortdistance apart. Both brushes of a pair are in engagement with a segmentwhen a car reaches the slow down point for the corresponding floor. Whenthe car moves a very short distance beyond such ioor, the leading brushof the pair engages a segment for the next floor and the trailing brushpasses out of engagement with the segment for the floor which the car isleaving. The brushes are so spaced that two segments are engagedsimultaneously for a short distance of car travel. (Group III.)

The brushes which cooperate with the segments in row Ic control theenergization of the stopping relay 38-2. As previously mentioned, thesegments in this row are efiective during both upward and downwardtravel of the car. Accordingly, an up brush cUi is provided to cooperatewith the segments in row 7e during upward travel and a down brush lcDlis provided to cooperate with the segments in row lc during downwardtravel. Brushes kUl and lcDl come into engagement with a segment justbefore the car reaches the slow down point for the corresponding floorand pass out of engagement with the segment just after the car passesthat point. (Group IV.)

The brushes which cooperate with the segments in rows m and n controlthe lighting of the floor lanterns. These brushes engage a segment justbefore the car reaches the slow down point for the corresponding floorand remain in engage-y ment with that segment until the car has moved ashort distance beyond the corresponding floor. (Group VI.)

The brushes which cooperate with the segments in rows p and r controlthe lighting of the operators signals F--l and F-Z. These brushes passout of engagement with a segment just before the car reaches the slowdown point for the corresponding oor, and are in engagement with thesegment for the next floor while the car is standing at suchcorresponding floor. (Group VII.)

The following tabulation gives the function of the various relays andswitches and identifies the group in which any coil or contact islocated.

Coil and contact locations Function and designation Group I Group IIGroup III Group IV Group V Group VI Group VII Group VIIICall-registering relays:

Coil

hash@ Coil d Coil MSD Direction determining relays BOU-1 SOD-1 Coil kCoil lc Reversing switches: n

Accelerating switch:

GHG-1 Stopping relays:

Car 1 Car 2 :is-1 :is-1 con a Holding relays:

Car i Time relays:

ar l T-l Car 2 M-2 Coil a Coil Car 2 T-2 a Coil b H a n r H n n Functionand desiga *Si a H nation :i :i n c: E E 2 2 E 2 E E U C U t5 C1 3 C)Transfer relays:

Carl Car2 PB-i Pia-2 a b c Cgil Isolating relays: Carl Car2 r-i P-2 aCoil Slow-down switches: Carl Car2 2R-1 zit-2 Coil a b Stoppingswitches:

Car Car2 iR-i iR-z Coil DETAILED DESCRIPTION on OPERATION Referringagain to Figs. 3, 4, and 5, the operation in detail of the system is asfollows. The rst part of this description covers the starting of one carand the stopping thereof from its car buttons. The second part coversthe stopping of any car of a bank of cars in response to hall calls.

Assuming that switch 20, at the top of Fig. 3 has been closed, therebyenergizing line conductors 2| and 22, which extend throughout Figs. 3, 4and 5, and further assuming that car l was travelling in the upwarddirection when it arrived at the fifth floor, the circuit for the coilof up.-direction-determining relay BDU-l (Fig. 7, Group VIII) iscompleted and remains so until the car either reaches a terminal landingor is reversed by operation of the down starting button BD-l (Fig. '7,Group VIII).

The circuit for relay BUU-l extends from line conductor 2| through thenormally closed contact a. of down starting button BD--I coil BDU- i,normally closed contact members MDK-l of the down-direction-determiningrelay, and limit switch LU-|, to negative line conductor 22. Limitswitch LU-I may be of any conventional type, disposed to respond to thearrival of the car at the upper terminal.

Upon completion of this circuit relay BDU-I is actuated to close Contactmembers 80Ua-l, 80Ub-l, BUUc-l, 8|lUd-I, llUe-I, BUUi-I, 8DUg MUM-I,BEJUi-I and 89Uil and to open contact members Uk-I.

The closing of the a, b, c, d, e, f and y' contact members of relayBDU-l prepare circuits associated with the call-registering relays, thecall storing relays, the zoning relays and the operators signal F-I.These circuits are concerned with the response to hall calls, and arediscussed in the second part of this description.

The closing of contact members BOUg--I preparesk a circuit for the coilof relay 38-I (Group IV), thereby conditioning the system to respond tocar calls during upward travel.

The closing of contact members BUUh-l completes a circuit for theretaining coils associated with car buttons PRS-l, PRA-l, PRS- l andPRB-I. This circuit is shown in Group IV and includes the retainingcoils, in parallel, and contact members 80Uh-l.

The closing of contact members BDUi-l com pletes a circuit for the upfth oor lantern LSU-I associated with car l, thereby advising anyintending passengers at the fifth floor that car No l is there and isconditioned to travel upwardly, This circuit is shown in Group VI andincludes lantern LU-I, fth floor selector segment ini, selector brushm-I, contact members 8Ui-I, and contact members GRB?)- I, which areclosed at this time.

The Opening of contact members 80Ulc-I prevents completion of a circuitfor down direction determining relay SDD-I (Group VIII).

OPERATOR CLOsEs UP-sTARTINo BUTTON BU-l, STARTING GAR UPWARDLY SwitchRU-I closes Closure of the up starting button BU-I (Group VIII) for carI completes a circuit for up-reversing switch RU-I to thereby cause carI to start upwardly. This circuit includes the normally open contactmembers b of starting button BU-I, coil RU-I, an interlock RDb-I Of thedown reversing switch, and contact members a of stopping relay IR-I.Upon completion of this circuit up-reversing switch RU-I closes contactmembers RUa-I, RUC-I, RUd--I, RUe-I and RUf-I, and opens contact membersRUb-I, all of which are included in Group- VIII.

RU-Z self-holding circuit Closure of contact members RUa-I, which areconnected directly in parallel with the contact members b of button BU-Icompletes a selfholding circuit for coil RU-I, so that only a momentaryclosure of up button BUL--I is necessary.

Generator field Gf excited Contact members RUd--I and RUe-I complete acircuit tor the separately excited eld winding Gf of the generator G.This circuit includes a slow-down resistor Rf-I which limits the fieldcurrent to a relatively low value, sufricient to cause a low operatingspeed of hoisting motor 5.

Brake 6 releases; relay M--l operates; car starts Accelerating switchGR6-1 closes Closure of contact members RUc-I completes a circuit forthe coil GRB-I of an accelerating switch, which also includes thenormally closed contact members of slow-down switch 2R-I. Uponcompletion of this circuit switch GRE-I opens contact members GRBa-I,GRb-I and GREC-I and closes contact members GRSd-I.

Fifth floor lantern L5U-1 extinguished Contact members GRSa--I areassociated with the resetting circuits for the call-storing relays ofcar I and their eect is described in the second part of thisdescription. Contact members GRb-L in opening, extinguish the up iiithfloor lantern LEU-I (Group VI). Contact members GREC- I preventenergization of the coil of stopping svn'tch IR-I while the car istravelling at high speed.

Car at full speed Contact members GRSfZ-I are in parallel with resistorR-I (Group VIII) and upon closure short-circuit this resistor and applyfull iield current to iield winding Gf. To simplify the drawings, theclosure of the accelerating contact members GRSCZ-I is shown asoccurring almost simultaneously with the closure of the reversing switchcontact members RUd-I and RUe-I. In practice, the closure of theaccelerating contact members will be slightly delayed. The applicationof full field current to generator G results in full speed operation ofmotor 5 and of the elevator car.

Upon completion of the above described circuits, in response to themomentary closure Of up starting button BU-I, the car will continue tctravel upwardly at high speed until intercepted by a call, or until aterminal is reached. TO simplify the drawings, apparatus foraccomplishing the stopping of the car at terminal landings has not beenillustrated. Such apparatus may consist in conventional terminalslowdown switches, but preferably also includes callregistering andcall-storing circuits similar in all respects to those which have beenillustrated for the intermediate iioors.

OPERATOR RiaGrsTERs CAR CALL, STOPPING CAR AT 6TH FLOOR Button PR-lclosed Assuming the operator desires to stop the car at the sixth floor,he may operate the sixth floor car button PRS- L at any time before thecar reaches the slow down point for the sixth floor. Operation of thisbutton after the car has approached too closely to the sixth iloor topermit a normal stop, is oi no eiect.

Stopping relay 38-1 operates Button PRS-I, upon being manually closed,is held closed by the retaining coil shown immediately below it, aspreviously described. When closed, button PRG-I prepares a circuit forthe coil of stopping relay 38-I, as shown in Group IV. Just prior to thearrival of the car at the slow down point for the sixth floor, selectorbrush lcU-I engages Segment- Bk-I, and completes the circuit for thecoil of relay SS-L prepared by button PRG-i. As shown in Fig. 5, thisenergizing circuit for relay 38-I remains complete until the car haspassed a short distance beyond the slow down point for the sixth floor,at which time the selector brush lcU-I passes out of engagement withsegment Sk-I Relay Q operates; slow-down .SwitchJ ZR-l energized Uponenergization of coil 38-1, contact members .28a-I (Group VIII) areclosed. and complete a Circuitl for the coils of slow-down switch R-Iand an auxiliary holding relay Q--L Upon completion of this circuit,relay Q-I operates and closes contact member Qa-I. rIhese contactmembers are in parallel with contact members 33a-I and complete aholding circuit for coils '2R-I and (Q -t.

.Switch 2R-1 passes plate and operates; switch GR-l deenergieed Aspreviously mentioned, energization Of the coil of slow-down switch 2R-lhas no immediate effect upon contact members a and b of this switch.When the car, in its upward movement, brings slowwdown switch ZR-ladjacent the up slow down inductor plate 2U associated with the sixthfloor, as shown in Fig. l, contact meme bers a thereof are actuated tothe open position.

The opening oi these contact members interrupts the circuit for the coilof accelerating switch GPUL-I. Switch GRS-l accordingly opens contactmembers GRd-l and recloses contact members GRM- i, GREb-l and GREC-l.

Car slowed down; lantern L6U-1 lighted; switch 1R-1 energized brush M-Iis in engagement with the sixth floor selector segment (im- L as shownin Fig. 6. This circuit lights up the sixth floor lantern, inform ingany intending passengers at the sixth floor of the approach of the car.

Switch 1R-1 passes plate and operates; switch RU-l deenergized When thecar approaches Within a short distance of the sixth floor, stoppingswitch IR-l is brought opposite the up stopping plate IU, as shown inFig. 1, and contact members a thereof are opened. The opening of thesecontact members interrupts the circuit for coil RU-I, opening contactmembers RUa-I, RUC-I, RUd-l, RUe--l and RUJ-l and closing contactmembers RUb-L Generator field deenergieed; brake applied; car stopped;relay M--Z and Switches .2R-1 and 1R-1 deenergieed The opening ofcontact members RUa-I and RUc-I, and the closure of contact membersRUb-l, is without eiiect. The opening of contact members RUf-Ideenergizes the release coil of the electro-magnetic brake anddeenergizes coil` M-L The opening of relay M--l has no eiect other thanto prevent energization of the coils of slow down and stopping relayLR-l and IR-I when the car is at rest. The opening of contact membersRUd-i and RUe-l interrupts the circuit for the iield winding GF ofgenerator G. This operation, together with the application of brake 6,brings the car to rest at the sixth iioor.

OPERATOR CLosns DowN STARTING BUTTON BD-l STARTING CAR DOWNWARDLY Aslong as the car remains at the sixth floor, up*direction-determiningrelay SBU-l will remain energized to condition the selector for fur- Updirection determining relay U-1 deenergiaed; car buttons released;lantern LEU-1 ea:- tinguished Operation of down button BD- opens itscontact members a and closes its contact members b. 'I'he opening ofcontact members BDa-I deenergizes the coil of up-direction-determiningrelay SDU-I. Accordingly, this relay resumes the deenergized position,opening contact members Ua-I, 80Ub-I, 8Uc-l, Ud-L SDUe-I, Uf-I, 80Ug|,Uh-L BUi-l, and iUi-l and reclosing contact members Ulc-l. As previouslymentioned, the a, b, c, d, e, f, and y contact members of relay SGU-Iare concerned with the response to hali calls and their eiect isdescribed in connection with the response to hall calls. The opening orcontact members 80Uh-l interrupts the circuit for the retaining coilsassociated with the car buttons (Group IV), thereby restoring anyoperated car buttons to the illustrated open position. The opening ofcontact members Ui-I interrupts the circuit for the up sixth floorlantern LSU- i, thereby extinguishing this lantern (Group VI). Theopening of contact members BEIUg-l discon nects the up floor selectorbrush kU-l as shown in Group IV.

Down direction determining relay 80B-1 operates Reclosure of contactmembers 8llUl completes a circuit for the coil ofdown-direction-determining relay 80B-l. This circuit is shown in GroupVIII and includes the now closed contact members a of button BU-I, coililD-l, contact members BOUlc--L and a limit switch LD-I, arranged to beopened when the car reaches the lower terminal.

On completion of this circuit, relay BBD-I closes contact membersStDa-I, 8GDlJv-I, BlIDe-l, 80Dd-I SiJDe--L 80Df-I, 80Dg-|, 80Dh|,8UDi-l, and SDj--l and opens contact members 80Dk-I. The a, b, c, d, e,f andy' contact members of relay 80B-l are associated with the circuitsof the call-registering relays, the call-storing relays, the zoningrelays and the operator signal F-L and their effect is de scribed laterin connection with the response to hall calls.

Car button retaining coils energized The closing of contact members8llDh-I completes a circuit for the retaining coils associated with thecar buttons, as shown in Group IV.

Lantern LD-I lighted The closing of contact members Di-I completes acircuit for down sixth licor lantern LSD-l, thereby advising anyintending passen gers at the sixth iloor that car No. I is conditionedto travel downwardly. This circuit is shown in Group VI and includeslantern LSD-I, sixth floor selector segment iin-4, selector brush n-|,contact members SDi-l and contact members GRSIr-l which are closed atthis time since the car is at rest.

The opening of Contact members Dlc-l prevents completion of a circuitfor the coil of relay SDU-l. (Group VIII.)

Down reversing switch RD-l operates, cansino car totravel downwardly atfull speed Closure of the b Contact members of button BD-I completes acircuit for the coil of down reversing switch RD-I, which also includesinterlock contact members RUb-l and contact members b of stopping relaylR-l.

Upon completion of this circuit, down reversing switch RD-i closes itscontact members RDa-l, RDC-l, RDd-l, RDe-L and RD-L and opens itscontact members RDb--i Contact members RDn-l are connected in parallelwith the b contact members of button BD-l and closure thereof completesa self-holding circuit for down reversing switch RD-l.

The opening of contact members RDb-I prevents completion of a circuitfor the coil of up reversing switch RU-I.

Closure of contact members R-Dd-l and RDc-l completes a circuit for theeld winding GF of generator G, which also includes the slowdown resistorR-i. This circuit for field winding GF is the reverse of the circuitdescribed in connection with up travel, and results in a supply tc motor5 of voltage tending to cause downward travel at low speed.

Closure of contact members RDf-l energizes the release coil of theelectromagnetic brake 6 and coil M-I. Upon release of the brake and theapplication of low voltage to motor 5, the car is started downwardly atslow speed. The energize-tion of coil M-E, as previously described,prepares a circuit for the coils of slow-down and stopping relays ZR-land lRf-l.

Closure of contact members RDC-l completes a circuit for the coil ofaccelerating switch GRS-i which circuit includes the contact members bof slow-down relay ZR-l.

Upon completion of this circuit, accelerating switch GRE-l opens itscontact members GRGa-I, GRBb-l, GRBc-l and closes its contact membersGRd-I. Closure of contact members GRBd-l accelerates the car to fullspeed, as previously described. rIhe opening of contact members GRa-l isconcerned with the operation of the call-storing relays (Group II) andis described later.

Lantern LD-l etinguished The opening of contact members GRGb--linterrupts the circuit for the down sixth floor lantern LSD-l, therebyextinguishing it (Group VI).

The opening of the contact members GREC- i:

prevents completion of a circuit for the coil of stopping relay lR-Iwhile the car is travelling at high speed, as previously described(Group VIII).

Upon completion of the above-described circuits, the car will continueto travel downwardly until intercepted by a call or until a terminal isreached, as described in connection with up travel. While travellingdownwardly, the car may be stopped, in the natural order of the floors,at any floor for which a car button is operated, providing such carbutton is operated before the arrival of the car at the slow-down pointfor the corresponding floor. This may be illustrated by assuming thatcar buttons PRS-l and PRS- I for the fth and third floors, respectively,are operated.

OPERATOR CLosEs CAR BUTTONS PR-l No PRS-L CAUsrNG S'rors AT 5TH AND 3RDFLooRs Upon being manually closed, buttons PRE-I and PRS-l are retainedin closed position by their retaining coils, shown immediately below thecorresponding buttons in Group IV. Closure of these buttons preparescircuits for the coil of stopping relay S23-I.

As shown in Fig. 2, just before the car reaches the slow-down point forthe fifth floor, brush ICD-l engages fifth floor selector segment 51e-I,thereby completing a circuit for the coil of stopping relay i-I whichalso includes the now closed contact members Df-l. As mentioned inconnection with up direction operation and as shown in Fig. 2, thiscircuit remains complete until the car has passed a short distancebeyond the slow-down point for the fifth floor.

As described in connection with up direction travel, stopping relay 38-lcloses its contact members SBd-l, thereby completing a circuit for 1thecoils of slow-down relay 2R--I and auxiliary holding relay Q-l (GroupVIII). Relay Q-I, in turn, closes contact members Qa--l to complete aholding circuit for coils Qi and 2R-I.

When the car in its downward travel brings slow-down relay ZRf-lopposite magnetic plate 2D, contact members b thereof are actuated t0the open position, thereby deenergizing the coil of accelerating switchGRB-i which opens its contact members GREd-l, and recloses its contactmembers GR6a-|, GRGb-I and GRGc-L Lantern L5D-1 lighted Closure ofcontact members GRGc-l is without effect. Ihe closure of contact membersGRBb--l completes a circuit for the fifth floor lantern LED-l since atthis time, selector brush n--I is in engagement with the fth floorselector segment n-I, and since contact members SUDi-I are closed (GroupVI). Accordingly, the fifth floor down lantern is lighted to inform anyintending passengers at the fth floor of the approach of the car.

The reclosure of contact members GRBc-I completes a circuit for the coilof stopping relay lR-l as previously described (Group VIII).

The opening of contact members GRBD-I reincludes resistor R-l in thecircuit of eld winding GF, thereby initiating the slow-down of the car,as previously described (Group VIII).

When the car reaches a point a short distance above the fifth floorlanding, stopping relay lR-i is brought opposite magnetic plate ID andcontact members b thereof are actuated to the open position, therebydeenergizing the coil of down reversing switch RD-l, which opens itscontact memers RDa-|, RDC-l, RDd-i, RDe-l, RDf-l and recloses itscontact members RDb-I (Group VIII).

Car stopped at 5th floor The opening of contact members RDd-l and RDC-land closure of Contact members RDb-I is without effect. The opening ofcontact members RDf-I applies electromagnetic brake 6 and releasesholding relay M--I scribed. The opening of contact members RDd-l andRDe-l deenergizes field winding Gf, and, together with the applicationof brake 6, brings the car to rest at the fth floor.

As long as the car remains at the fifth oor, the down fth floor lanternLED-I will remain lighted, to inform intending passengers that the caris conditioned to travel downwardly.

Car restarted downwardly; lantern LSD-1 extinguished The car may beagain started downwardly by reoperation of down button BD-l, thestarting and acceleration being as previously described. As the carleaves the fth floor, lantern LSD--l is extinguished by the opening ofcontact memas previously de- The stopping at the third oor in responseto the energization of relay S8-| is in all respects similar to thestopping operation described for the fifth floor, third floor downlantern LSD- i being lighted when slow-down is initiated and remaininglighted as long as the car remains at the third floor.

Successive stops in response to car buttons It is believed obvious fromthe above description of the response to car calls during downwardtravel that the car may be stopped in its upward travel at any number offloors at which car buttons are operated, regardless of the order ofoperation, as long as such car buttons are operated before the slow-downpoint for the corresponding floor is reached.

RESPONSE or SYSTEM 'ro HALL CALLS Operation of zoning relays Aspreviously mentioned, the zoning relays shown in Group III are common toall the cars in the bank and have the effect of dividing the hatchwaysinto zones in such a way that all the hall calls registered between theposition of any one car and the next car in advance travelling in thecorresponding direction, or between such one car and the correspondingterminal, are received by the call receiving mechanism of such one car,to the exclusion of the other cars. These zoning relays also preventresponse by the call receiving mechanism for any one car to hall calls.registered for floors which that car has passed. The zoning relays forthe respective oors and directions are operated as the cars pass therespective doors in the following manner.

Relay S'3D operates Assuming that car I is still standing at the thirdfloor, conditioned to travel downwardly, as in the previous description,a circuit is completed for third floor down zoning relay SSD, sincecon-l tact members BDe--l and 80Df-I are closed, since trailing brush jl is in engagement with third floor selector segment Sy'-I, as isevident from Fig. 2. Contact members Pa-l are provided to isolate car lfrom the zoning sys tem and are operated only in the event of aprolonged closure of the operators button PB-I (Group VIII). Throughthis circuit, down third floor zoning relay SSD remains energized aslong as the car remains at the third floor, conditioned to traveldownwardly.

Car reversed Relay 80D-1 deenergieed For example, assuming that car I isreversed manually at the third floor by operation of up button BU-l, thecircuit for down-directiondetermining relay 80B-I is interrupted. RelayBUD-l accordingly opens contact members 80Da-l through BilDj-i and.recloses contact members llDlc-I. The opening ot contact members SDDe-linterrupts the circuit for the coil of third oor down zoning relay SSD,which thereupon falls to the deenergized position (Group III).

Relays 80U-1 and SSU operate The reclosure of contact members SilDk--Icompletes a circuit for the coil of up direction determining relay lU-I(Group VIII). As a consequence, contact members 80Uf-l close, completinga circuit for the third floor up zoning relay SSU, since with the car atthe third floor trailing brush z'-| is in engagement with the up thirdiioor selector segment Si-i (Group III). This circuit remains completeas long as the car remains at the third floor in condition to travelupwardly.

Car leaves 3rd floor; relay S4U operates Just after the car leaves thethird floor travelling upwardly, as shown in Fig. 2, leading brush i-lengages fourth floor selector segment 4i-l thereby completing a circuitfor fourth iioor up zoning relay SAU.

Relay S3U aeenergieea Just after completion ci' this circuit, trailingbrush i-i passes out of engagement with third oor selector segmentSie-I, thereby deenergizing third oor up zoning relay SSU.

Car passes 4th floor; relay S5U operates; relay S4U deenergieetlSimilarly, just after the car leaves the fourth oor travelling upwardly,fifth licor up zoning relay S5U is energized by the engagement of fthfloor selector segment .rsi-l by leading brush il and fourth floor upzoning relay SGU is deenergized by the disengagement of segment 4i-l bytrailing brush z'-i. From this description it Will be seen that thearrangement is such that the up zoning relay for any iioor is energizedjust after the car leaves the preceding floor, travelling upwardly, andremains energized until just after the car leaves that floor, travellingupwardly, unless reversal is made at such floor, in which event, the upzoning relay is deenergized at the time the reversal is initiated by thedeenergization of up-direction-determining relay SDU- i.

Operation of down eom'rzg relays It is believed to be obvious also thatduring downward travel of the car the down zoning relay for any floor isenergized just after the car leaves the preceding floor and remainsenergized until just after the car leaves that floor, travellingdownwardly, unless reversal is made at such floor, in which event thecorresponding down zoning relay is deenergized at the time reversal isinitiated by deenergizing relay SGD-I.

Zoning relays responsive to each car in` system As also shown in GroupIII, the zoning relays respond to the movements of car 2 in the samemanner as described in connection with car i, since the segments llii,4i-l, Sy'-l and 1j-i are connected directly in parallel with thecorresponding segments associated with car 2. Similarly, correspondingsegments for additional cars would also be connected in parallel withsegments ii-I, li-l, Sj-l, lj-l, etc. With this arrangement at any giventime one zone relay is operated by each car of the bank. For example,assuming cars I and 2 are both conditioned to travel upwardly, and areat the fifth and third iloors, respectively, as shown in Group III, fthfloor up Zoning relay SEU is operated by car l and the third floor upzoning relay SBU is operated by car 2. Ii car l is conditioned to travelupwardly and car 2 is conditioned to travel downwardly, up zoning relayS5U is operated by car l and down zoning relay S3D is operated by car 2.The positions and directions of travel of any other cars in the bankwould similarly determine the operation of others of the zoning relays.

Zoning relay contacts Each Zoning relay is provided with a, h, c and dcontacts, identified as SSUa, SSUD, S3Da, SSDI), etc. The a contacts ofthe zoning relays are shown in Group I, and are associated with thecircuits for the resetting coils of the call-registering relays ASU,AGD, etc.

Contacts SfiUa, S5Ua, etc., of the up Zoning relays forminterconnections between segments Sc--L lici, etc., associated with cari, as well as between the corresponding oor selector segments associatedwith car 2. The corresponding segments of other cars of the bank wouldalso be connected in parallel with the segments 3c-l, llc-l, etc.

'Zoning relay a contacts; call registering relay resetting Theinterconnections formed by the contacts SlUa, SEUa, etc., permitcompletion of the resetting circuits for any up call-registering relaysassociated With oors between the position of any car conditioned totravel upwardly and the next highest car conditioned to travel upwardly,or the upper terminal, and prevent completion of the resetting circuitfor the up call-registering relay for any floor below the position ofsuch car. For example, assuming car l is standing at the fifth floor andcar 2 is standing at the third oor and that both cars are conditioned totravel upwardly, zoning relay contacts S5Ua and S3Ua will be opened, aspreviously described. Brush c-l will oe in engagement with segment 5c--land the corresponding brush oi car 2 will be in engagement with thethird floor segment for car 2. Accordingly, subject to operation or thecancelling relays MoU, M42-U, etc., later described, a circuit can becompleted for the resetting coil of up call registering relays AEU orAGU, or any other higher floors (not shown) through the segment Sc--iand brush c-i and the zone relay contacts SSUa, etc., for floors abovethe position of the car. Contact SEUa of the ith oor up Zoning relaySoU, being open, prevents completion through segment 5c-i and brush c--ioi a circuit for the resetting coil of any up call-registering relaycorresponding to a iioor below the ith iioor. Contact SEUa also preventscompletion through the corresponding brush and segment oi car 2, of acircuit for the resetting coils of up call-registering relays ASU, AiSUand those associated with higher floors.

Action of other cars Similarly, circuits for the resetting coils ofthird and fourth floor up call-registering relays ASU and AiU can becompleted through the corresponding brush and segments associated withcar 2. Contact SSUa being open, prevents completion through thecorresponding brush and segment of car 2 of a circuit for the resettingcoil of any up call-registering relay for a floor below the third iioor.This Contact member also prevents completion oi a circuit, through thecorresponding brush and segment of any other car which may be positionedbelow the third floor, for the resetting coils of up call registeringrelays 3U and AQU.

Contact members SSDa, SQDa, etc., of the down zoning relays formcorresponding interconnections between the floor selector segments ofall of the cars which are associated with the circuits of the resettingcoils oi the down call-registering relays A3D, Atl), etc., and functionto permit resetting by any car conditioned to travel downwardly oi downcall-registering relays between the position of such car and the nextcar, or the lower terminal, and to prevent resetting by such one car ofany dov-.fn call registering relay for lio-ors above the position ofsuch one car. scribed in connection with the up Zoning relays, thecontacts SYSDa, SfiDa, etc., of the down zoning relays also preventresetting of down call-registering relays by any car except the carwhich is nearest the corresponding floor.

Zoning relay b contacts; call-storing relays, car 1 'I'he b contacts ofeach of the Zoning relays are shown in Group II, and are associated withthe call-storing relays for car l. The b contacts of the up zoningrelays form connections between the segments Scl-E, Lig-i, Eg-l, (ig-i,which control the energiZatic-n of the call storing relays EIT- i,EQU-5, etc., and the D contacts of the down zoning relays are similarlyassociated with segments Sh-i, dh-l etc.

Through these interconnections, when car i is standing at any floorconditioned to travel upwardly, a circuit for the call-storing relayassociated with any door between the position of the car and the nexthighest car conditioned to travel upwardly, or the upper terminal can hecompleted through brush g-i and the segments Ey--L Ly-i etc., engaged byit, and completion of the circuit for the call-storing relay associatedwith any floor below the position of the car is prevented. Also with cari standing at any oor conditioned to travel downwardly, a circuit can becompleted through brush h-i and one of the segments Sli-L .fini, etc.,for the down callstoring relay associated with any door between theposition of the car, and the ext lowest car conditioned to traveldownwardly, or the lower terminal, and completion of the circuit for thedown-call-storing relay associated with any licor above the position or"the car is prevented,

Zoning relay c contacts; call-storing relays, cor 2 The c contacts or"the up and down zoning relays are also shown in Group II and control thecircuits of the call-storing relays IMU-2, B3U--2, etc., associated withcar 2, in the manner described in connection with the b contacts ofthese relays. Similarly, the call-storing relay circuits for all othercars of the bank would have contacts of the Zoning relays associatedtherewith in the As de- Lif manner illustrated for the b and c contactsof the Zoning relays.

Zoning relay d contacts; operators signals F--1 and F-Z The d contactsof the zoning relays are shown in Group VII. The d contacts of the upzoning relays form interconnections between the segments 31a-l, 4p-I,5pt-l, etc., which control the operators signal F--I, and the time relayT--I, as well as between the corresponding segments associated with car2. Through these interconnections, when car I is standing at any floorconditioned to travel upwardly, the operators signal F-I can beilluminated in response to an operated up call-registering relay for anyfloor between the position of the car and the floor at which the nexthighest upwardly moving car is positioned, or the upper terminal, andcannot be illuminated in response to operation of a callregisteringrelay for the oor below the position of the car. Similarly, when car 2or any other car of the bank is standing at any floor conditioned totravel upwardly, these interconnections permit operation of theoperators signals 1?*2, etc., in response to operation of any upcallregistering relay for floors between the position of such car andthe next highest car conditioned to travel upwardly, or the upperterminal, and prevents operation of the operators signals F2, etc., inresponse to up call-registering relays for iioors below the position ofsuch car.

The d contacts associated with the down zoning relays SSD, SIID, etc.,form interconnections between the segments 3r-I, 4r-I, etc., associatedwith car I, as well as between the corresponding segments associatedwith car 2 and all other cars in the bank. These contacts of the downzoning relays function, during the downward travel of thercars,corresponding to the d contacts of the up zoning relays and permitoperation of the operators signals F-I, F-2, etc., in response to thedown call registering relays associated with any floor between theposition of car i or car 2 and the next downwardly moving car, or thelower terminal, and prevent operation of signals F-I and F--2, etc., inresponse to down call-registering relays above the positions of therespective cars.

Assuming throughout the following examples, that car I is the leadingcar, that is, the car nearest any floor at which it is assumed a call isregistered, the response of the system to hall calls is as follows.

As previously mentioned, if car I is standing at the fourth floor andconditioned to travel upwardly, up-direction-determining relay BDU-I andup fourth zoning relay S4U are energized and the up vfourth floorlantern L4U-I is lighted.

Button CGU registers 6th floor up call,- call registering relay A6Uoperates Il an intending passenger at the sixth floor wishes to travelupwardly and operates button CGU, a circuit is thereby completed for theactuating coil of up call-registering relay A6U, as shown in Group I.Upon completion of this circuit up call-registering relay A6U closes itscontact members a, b, c, d, e and f.

Self holding' circuit for relay A6U Contact members AEUa are connecteddirectly in parallel with the contact members of push button CGU andcomplete a self-holding circuit for the coil of up call-registeringrelay A6U.

Contact members AGUb prepare a circuit as shown in Group II for the coilof up call-storing relay BSU- L associated with car I. This circuit alsoincludes the now closed Contact members M6Ub of the up sixth oorcancelling relays, contact members S5Ubl of the up fifth floor zoningrelay, contact members AEUd of the fth floor up call-registering relay,segment g-i, brush gni (now in engagement therewith as shown in Fig. 2),contact members IlUc-I, and the now open contacts Ta-I of the time relayand PBb-I oi the operators push button.

Action for car 2 Contacts A6Uc associated with up sixth ncorcall-storing relay BGU-2 for car 2 also close, but since car I isassumed to have been 'the nearest carto the sixth iioor, the now opencontacts S4Uc of the up fourth iioor zoning relay prevent completion ofa circuit for up sixth floor eallstoring relay BSU-2 through thecorresponding brush and segment for car 2.

The opening of contact members AGUCZ and ABUe, also shown in Group IIand associated with cars I and 2, respectively, is without effect atthis time,

Operaiors signal F-l lighted; relay T--l operates Closure of contactmembers AQU oi' upcali" registering relay A6U completes a circuit forthe operators signal FI and the time relay 'lC--i associated with Car I,as shown in GroupVII. This circuit extends through Contact members AEU,contacts S5Ud, fth floor segment Ep-I, brush p--I (now in engagementtherewith as shown in Fig. 2), Contact BBUi-L signal F-l and coil 'IL- Iin parallel, and through theV new closed contact members PBc-I to theother side of the line.

Upon completion of this circuit, time relay T-I operates, closing itscontacts Ta-I in the circuit of brush g-I, Group II, and opening itscontacts Tb-I in the circuit of warning signal W-I and by-pass relay P-Ishown in Group VIII.

The consequent lighting of signal FMI in car I informs the operatorthereof that at some iioor between the position of his car and the upperterminal or between the position of his car and the next highest car acall has been registered by a passenger desiring to travel upwardly.

Operator closes button ABF-1; relai.l PB-l operates At any time afterthe lighting oi signal lamp F--I, the operator of car I mayT appropriatethe call to his car by closing button AB-i Closure of this buttoncompletes a circuit ier the coil of relay PBI, as shown in Group VIII.In response to completion of this circuit, relay PB-I opens contactsPECL-I, starts an opening movement of contact members PBc--I, closescontact members PBb-I and starts a closing move ment of contact membersPBd-I.

Contact members PBa-I are included in the circuits of iloor selectorbrushes c-i and ci-l as shown in Group I, and prevent the tion of acall-registering r lay resetting coil through these brushes as long asme operator holds button AB-I in the closed position.

Call-storing relay BSU-1 operates Closure of contact members PBli-Icon'uiietes a circuit ior the actuating coil of call-stcring reil OSignal Fl extinguished; relay T-l deenergz'eed Contact members PBC-iupon opening interrupt a circuit for signal lil-l and time relay T-l, asshown in Group VII. The opening, as Well as the closure, of thesecontact members is slightly delayed, preferably by means of an air oroil dashpot (not shown). The delay in opening is provided to insureclosure of Contact members PBb-l in Group II prior to the reopening ofcontact members Ta-l, connected in series therewith, The delay inclosure is provided to ensure proper resetting sequence, as later described.

Closure or contact members PBd-l is Without effect, because Contactmembers 'Ibi, connected in series therewith, as shown in Group VIII, areLro"'..ed with means, preferably an air or oil ashpot, to delay theclosing movement thereof. accordingly, although coil T-l isdeenergized,y as mentioned in the preceding paragraph, contact members'Ib-l are still open. The delay in closure is preferably severalseconds. The circuit including contact members and ?Bcl-l is used tooperate warning signal W-i and relay P-i in the event the operator holdsbutton AB-l closed too long.

Self-holding circuit for relay B6U-1 Upon completion of the circuit forcall-storing relay BfU-l. contact members B'Ua-l, BGUZ7 l, Bellei,BiUd-I and BBUe-l are closed. Contact members BUa-I are connecteddirectly in parallel with contact members AGUD, and in conjunction withcontact members BGUb-i, complete a self-holding circuit for coil BU-, asshown in Group II.

Contact members BUc-i prepare a circuit for stopping relay BS-l, asshown in Group IV.

Caacellirlg relay MU operates Lantern L'U--1 lighted Closure of Contactmembers BEUe-l completes a circuit for up sixth door lantern LdU-l,which is lighted to inform the intending passenger at the sixth floorthat his registered call has been responded to and that car l will stopfor him. It will be observed that this circuit does not include a oorselector segment or brush and is consequently independent of thedistance between car l and the sixth oor.

Upon completion of the circuit for coil MU,

as traced above, contact members MBUa close and contact members MfS-Ui)and MSUc open.

Contact members MUa prepare a circuit for the resetting coil or"call-registering relay A6U, Which is shown in Group I, and includescontact members fiUa, coil AiU, Contact members MUa, contact members SUaand SUa of the sixth and fifth floor up zoning relays respectively,segment fici, brush c-l, contact members SUb-i, and the now open Contactmembers PBa-t The. opening of Contact members MGUb is without ei'ectsince as shown in Group II, and previously mentioned, the circuit forcall-storing relay coil BSU-l is maintained through contact membersBUb-l.

Action when two cars are standing at same floor rlhe opening of contactmembers MSU@ prevents completion oi an energizing circuit for coil BSU-2of the up sixth floor call-storing relay associated With oar 2, as shownin Group II. As a consequence, even though both cars I and 2 Werestanding at the same floor, and the operator or car 52 should close theoperators button PB-il, a call would not be registered on car 2. It willbe observed that should two cars be standing at same floor, conditionedto travel in the same direction, registration of a call in their zoneand for that direction operates both signals F-i and ELE. The b and ccontacts of the cancelling relays GMu, etc., are provided so that, insuch event the call is appropriated to the car in which the operatorsbutton AB-l or AB-2 is oA erated i'lrst, and response of a call-storingrelay for the other car is prevented.

Ii other cars are included in the same bank with cars l and 2,additional contact members on the call-cancelling relays would besimilarly associated with the call-storing relay circuits of such othercars.

Button AB-I released; relay PB--l deeaergieed If the operator releasesbutton AB-I after having momentarily held it in the closed position, thecircuit for relay PB-l is interrupted, and contact members PBa-l,PBZ7-I, PBC- l and PBd i resume the illustrated positions. The ei'ect ofa prolonged closure of button AB-l is described later.

Relay A6 U reset Reclosure of contact members PBa-l completes thecircuit for the resetting coil of callregistering relay ASU, shown inGroup I and previously traced. Upon completion of this circuit, theresetting coil impresses a magnetomotive force upon the relay armaturein opposition to the magnetomotive. force of the actuating coil andrelay AU resumes its non-actuated position, opening contact members AUa,AQUI), AEUc, ASU, and reclosing contact members AGUd and AiUe.

The opening or" contact members AUa, Group I, deenergizes both theactuating and resetting coils of call-registering relay A6U, whichaction is Without effect, since this relay has` already resumed itsnon-actuated position.

The opening of contact members A6U?) is Without effect because of thepreviously traced holding circuit for call-storing relay E5U-L shown inGroup II.

The opening of contact members ASUC is without eiect because or" theprevious opening of Contact members MBUc and S4Uc in the circuit of coilBSU-2 in Group II.

Reclosure of contact members ABUd and AGU@ associated with cars I and 2,respectively, and shown in Group II, is Without effect at this time.

The opening of contact members ABUf prevents recompletion of the circuitfor signal F-I and time relay T-I, in response to the slightly delayedreciosure of contact members PBC-4,

l as shown in Group VII.

'The` opening of contact members PBb-I interrupts the initial energizingcircuit for coil BSU-I, shown in Group II, but is without effect becauseof the holding circuit provided through contact members BIUb-L Theopening of contact members PBd-I is without effect since contact membersTb-I are still open, it having been assumed that the release of buttonAB-I occured prior to the timing out of contact members 'Ib-I.

Action of button AB-I summarized registering relay A6U to call-storingrelay BSU- i, by cancelling call-registering relay A6U-I.

Elect of cars passing one another As previously described, the up callregistered at the sixth floor causes operation of the operators signalF-I in car I because at the time button CSU was operated, car I was thenearest car to the sixth floor conditioned to travel upwardly. The upsixth floor call, however, having been transferred to the up sixth floorcallstoring relay BSU-I, associated with car I, remains registered oncar I regardless of relative positions in the hatchways subsequentlyassumed by cars I and 2, since as shown in Group II, the maintainingcircuit for call-storing relay BSU-I, is independent of the zoningrelays.

Button BU-l closed; car starts upwardly; relay 38-1 operates; car stopsat 6th floor Assuming that the operator of car I operates up buttonBU--l (Group VIII), the car is started upwardly and accelerated to fullspeed, as previously described. When the car reaches a point a shortdistance in advance of the slow-down point for the 6th floor, brushlcU-I engages segment Gle-I as shown in Group IV, thereby completing anenergizing circuit for stopping relay 38-I. consequent deceleration andstopping of the car at the 6th floor is as previously described.

Relay B6U--1 reset In this case, however, in addition to the operationsoccurring in the course of the slew-down operation previously described,the closure of contact members GRa-I, which occurs at the time slow-downis initiated, completes a circuit 'for the resetting coil ofcall-storing relay BSU- L This circuit is shown in Group II and includescontact members BSUd-I, the lower or resetting coil of relay BSU-,segment 6e-I, brush e-I, contact members BDUd-I and contact membersGRSa-I.

Upon completion of this circuit, the opposed magnetomotive forces of theactuating and resetting coils of relay BSU-I cause this relay to resumeits non-actuated position, opening contact members BIiUa--I, BUb-I,B5Uc-I, BSUd-I and BGUe--L The opening of contact members BIUa-I andBUb-l in Group II is without eiect since relay BGU--I has alreadyassumed the non-actuated position.

The opening of contact members BEUc-I in Group IV is without effectsince stopping relay 38-I has already performed its function ofinitiating slow-down.

Relay M 6U deenergieed The opening of contact members BSUd--Ideenergizes the coil of cancelling relay M6U, which thereupon openscontact members MfUa,` (Group I), and recloses contact members MBUbandMGUc (Group II). This operation is without effect at this time.

The opening of contact members B6Ue| is without effect since the circuitfor the up 6th fioor lantern LSU- I is maintained through segment m-Lbrush m-I, contact members BOUh-I and GRGb-L Through this circuitlantern LSU-I remains lighted as long as car I remains at the sixthfloor, conditioned to travel upwardly.

False calls prevented It will be observed that from the time the up 6thoor call registered by closing button CGU, was appropriated to car I,until car I slowed down for the sixth floor stop, cancelling relay M6U(Group V) remains energized. As a consequence, even though button CEU isagain operated by the same or another intending passenger,call-registering relay A6U is not again energized to register a falsecall. This is because a reclosure of button CGU in Group I wouldsimultaneously energize not only the actuating coil of relay A6U, butalso the resetting coil thereof.

Should such a reoperation of button CGU occur between the time car Istarted to slow down for the sixth floor and the time it left the sixthfloor upwardly, or was conditioned to leave the 6th floor downwardly,relay A6U Would be energized, but would almost instantaneously be resetagain. This operation is as follows.

Reclosure of button CEU completes a circuit for actuating coil A6U inGroup I as before, causing closure of contact members ASUa, ABUb, ABUcand AGU, and causing the opening of contact members ASUd and AGUe.

Closure of contact members ABUa again completes a holding circuit inGroup I. Closure of contact members A6U?) completes a circuit for theresetting coil of call-storing relay BSU-I (Group II), since with thecar standing at the 6th floor, brush e-I is in engagement with segmentSe-l. The resetting and actuating coils of the call-storing relays,though opposed magnetically, have substantially the same number ofampere turns, so that energization of either coil operates the relay,and simultaneous energization of both coils deenergizes the relay.Accordingly, call-storing relay BGU--I is again operated to close itscontact members BSUa-I, BBUb-I, B6Uc-I, BGUd-I and BGUe-L Closure ofcontact members BSUd-I in Group V again energizes cancelling relay MSUis standing complete a circuit for the correspondwhich, in turn, againcompletes the resetting ing operators signal and the correspondingcallcircuit for relay AGU, as shown in Group I and storing relays whichare independent of the previously traced, thereby again restoring thisrelay to the deenergized condition.

The closure of contact members BGUa-i and BEUZJ- completes a circuit forthe actuating coil of call-storing relay BU-l, and which, being wound inopposition to the resetting coil thereof, causes this relay to againresume the deenergized position.

The momentary closure of contact members BSUe-i in Group 1V, and BUe-lin Group V1, is without effect.

The operation just described of energizing and deenergizing thecall-registering relay, the callstoring relay and the call-cancellingrelay, occurs very rapidly. The momentary energization of the cancellingrelay MSU can be ensured by constructing the call-storing relay BSU- lin such a Way that closure of the contact members BSUd-l slightlyprecedes the closing of contact members BUlJ-l. This can, of course, beaccomplished by dashpots or other expedients well known in the art, andforms no part of the present invention.

It will be observed that the momentary energization of call-registeringrelay A6U in response to the above-described false call, tends tocomplete a circuit for the operators signal F-2 and time relay "IL-2,associated with car 2, and shown in Group Vil, which extends from lineconductor 2l through contacts AQU, SSUCZ, SllUd, the fourth iioorsegment and brush for car No. 2, Contact members SBUj-a and throughsignal lamp F-2, coil 'll-i2, and contact members PBC- 2 to the otherside of the line. Completion of this circuit may be avoided either byslightly delaying the closure of the f contact members of thecallregistering relays, or its effect may be disregarded since the lampis extinguished again almost immediately.

Action in response to plurality of hall calls Car l having been assumed,at the beginning of the preceding example to be standing at the fourthfloor conditioned to travel upwardly, and to have been the highest carof the bank of cars, it is believed apparent that operation of any uphall button for a floor above the position of car l will result inimmediate operation of the operators signal F-l, and that a momentaryclosure in response thereto of button AB-l will result in a transfer ofthe call from a corresponding call-registering relay to a correspondingcallstoring relay associated with car l, cancellation of thecorresponding call-registering relay, and immediate illumination of thecorresponding oor lantern for car l. it is believed to be apparent thatcar l may be caused to stop successively at any number of floors forwhich the call-storing relays have been operated, regardless of theorder of registration, so long as the transfer from a call-registeringto a call-storing relay occurs before the car reaches the slowdown pointfor the corresponding oor, and that once a call has been transferredfrom a callregistering relay to a call-storing relay, effectivereoperation of the call-registering relay is prevented until such carhas stopped at and moved away from the corresponding oor.

Response to hall call at nerr' floor It will be observed that hall callsregistered for a oor in advance of the iloor at Which the car zoningrelays. For example, with car l at the fourth floor, and conditioned totravel upwardly, brush p-l is in engagement with segment Ep--l for thefth floor, as shown in Group VII. Operation of the fifth floor up buttonenergizes relay ASU which, in turn, completes a. circuit for signal F-lwhich extends through contact members AEUf, segment 5p-l, brush p--i,contact members BDUi-l and through signal F-l and relay T-l and contactmembers PBc-l to the other side of the line, and a second circuitthrough contact members A5Ub, actuating coil BU-l, contact membersMliUb, to the segments 5g-l. In other respects, the response of a car toa call for the next floor is similar to the response to calls for moreremote floors, it having been assumed for simplicity that the speed ofthe elevator cars is such as to permit normal acceleration anddeceleration to and from full speed in the distance between adjacentfloors.

Hall calls at floors which car has passed As previously mentioned, theoperators signals for the cars respond to only those calls which are inadvance of the respective cars and which correspond as to direction oftravel. Assuming again that car l is at the fourth rloor, conditioned totravel upwardly, registration of a third floor up call, while effectiveto energize relay ASU, is ineffective to operate signal F-L sincecontact members SUcl of the fourth floor up zoning relay disconnectcontact members ASU from segment lip-I, with which brush p-l is inengagement. Closure of contact members A3Uf, however, does operate theoperators signal F-2 for car 2, assuming car 2 is positioned below thethird floor and conditioned to travel upwardly.

Directional response to hall calls u ing relays associated with car 2perform the same function in connection with operators signal F-2 andthe control systems of any other cars in the bank would be similarlyarranged.

Hall calls transferred one at a time As previously mentioned, although anumber of hall calls, corresponding in the direction of travel of thecar, may be registered at the same time, such calls are transferred tothat car one at a time, each operation of the operators button beingeffective to transfer the call which is nearest the car. For example,assuming that car i is standing at the third floor conditioned to travelupwardly, and that car 2 is at some position below the third floor, oris conditioned to travel downwardly, and that up calls are registered onthe fourth, fifth and sixth ocr hall buttons CllU, CSU, and CSU, callregistering relays AllU, AiU and A6U respond, closing their respectivea, l), c, and f contacts and opening their respective cl and e contacts.

The a contacts of these call-registering relays complete self-holdingcircuits as previously described. The b contacts of these relays closein

